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When you are being glacial, and icy to people on purpose, to make yourself appear intelligent and aloof.
Usually used to make yourself appear attractive to a member of the opposite sex who is chasing you.
Like playing hard-to-get!
Gina was full of glaciosity at Andy's parteh. She wanted to make Andy chase after her. She ignored him for the whole night!!
by sazzles May 26, 2007